Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Fri Sep 11 05:19:01 2026 Auto Mode Machine = Linux oleg204-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg204-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 3147 7072 515423 230257 64 8 2518 18109 809014 852702 64 16 2080 27038 969761 500060 64 32 1857 34669 1249666 282027 64 64 3231 51239 1204796 1336792 128 4 3382 5845 554157 597981 128 8 2578 12435 889145 673778 128 16 3967 28641 195097 847059 128 32 8659 15021 379734 969421 128 64 6390 48047 1266785 1294270 128 128 6959 89570 1455701 1802755 256 4 6050 8228 567575 578897 256 8 9050 22525 999940 898674 256 16 9825 31162 850282 1012194 256 32 13104 42867 1376935 1126926 256 64 11891 64895 1407621 349775 256 128 10276 77718 1561112 1445521 256 256 6646 48623 809878 888266 512 4 6125 6185 192051 380435 512 8 9285 13147 603089 154965 512 16 11106 18301 787545 570107 512 32 7873 19580 1218910 1066910 512 64 5016 52421 1299295 711133 512 128 12786 26241 1279935 1108203 512 256 11576 65198 1740536 1645826 512 512 18067 73574 1729323 1992458 1024 4 6716 4797 123076 496826 1024 8 9992 13761 363770 503701 1024 16 18695 29472 928479 854752 1024 32 17543 43349 1096548 792019 1024 64 13114 28280 414419 1268896 1024 128 30711 70036 849176 386279 1024 256 28048 63816 1294520 772225 1024 512 29084 80325 1071116 457115 2048 4 9531 6883 463548 304534 2048 8 4882 9295 109712 405859 2048 16 17267 17650 668591 314940 2048 32 18224 22083 688417 341781 2048 64 25735 26189 390917 731693 2048 128 39138 26180 1493952 333540 2048 256 22620 39373 210827 250276 2048 512 27543 35711 1775951 946048 4096 4 4371 5596 152053 222367 4096 8 8684 13230 276400 361036 4096 16 11580 8669 245578 297869 4096 32 14557 25843 546211 616964 4096 64 31180 34012 663217 406914 4096 128 40947 39697 1919365 748812 4096 256 60579 72212 899620 499330 4096 512 48982 62373 1635118 948597 8192 4 5298 5626 332357 247829 8192 8 9547 11588 275760 357122 8192 16 20751 18331 548581 691944 8192 32 17972 21661 464742 636376 8192 64 27203 30542 956568 781084 8192 128 31120 25279 796566 278801 8192 256 32529 42140 983904 404885 8192 512 26106 41284 1055118 687830 16384 4 5853 6761 211226 178749 16384 8 10881 9756 254686 205158 16384 16 14111 16542 579452 321532 16384 32 16477 18869 793804 506508 16384 64 20600 21488 693857 621407 16384 128 23485 42674 736789 883797 16384 256 46180 60816 791956 625890 16384 512 34113 51393 187982 705844 32768 4 7287 6545 180272 150649 32768 8 6200 8034 365323 180357 32768 16 16498 16610 416185 203897 32768 32 19505 16502 1077472 1033563 32768 64